What are the two levels of defense that humans have against patghogens what do their names mean?

What causes skin to turn a different color? What age are KS3 pupils? What could cause constant burping? Which is the safest pregnancy category? Leukocyte esterase ua? Minimal annular bulge c4-c5? What can a high-pitched ringing in the ears with slight loss of hearing and numbing of the hands mean? Why is the uterine lining important? Is it bad that a Bruise on my leg after wearing a tight sock the bruise became imprinted with the pattern of the sock? What infections cannot be cured with antibotics? Who is the black comedian who died lately? Who did Victor's mother catch scarlet fever from? How does one grow coarse hair? What is causing the blue pigment indigo to appear? What do you do if you can't find the toilet and your desprate to go? You have these slimy strings coming from the inside of your mouth and your gums are swollen an sensative what could this be? Tubal ligation 12 years ago but 2 months and 9 days late you have had some cramping in your lower abdomen and today a thick white mucus discharge you are thirty-six could you be pregnant? How do you read and use an a1c chart? When did world book day start? Why is the kidney supplied with large blood vessels?